YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1988 | 63.71 | n | 72.93 | a | 79.83 | a | 85.24 | a | 96.60 | a | 107.33 | 112.55 | 107.39 | 101.03 | 97.19 | 76.03 | a | 65.07 | a | 91.02 | a | |||||
1989 | 62.27 | a | 70.67 | a | 83.87 | a | 94.41 | a | 97.20 | a | 106.86 | a | 112.48 | 107.23 | 103.00 | a | 88.48 | 77.66 | a | 67.31 | b | 89.29 | ||||
1990 | 63.07 | a | 67.63 | a | 80.28 | b | 89.38 | a | 95.17 | a | 107.77 | 110.52 | 106.06 | 102.50 | 90.74 | 74.73 | 60.30 | a | 87.35 | |||||||
1991 | 62.90 | 77.32 | 68.97 | a | 84.62 | a | 91.19 | 101.63 | 110.35 | 107.55 | 102.07 | a | 93.39 | 73.79 | a | 63.50 | a | 86.44 | ||||||||
1992 | 63.26 | 70.38 | 73.29 | 90.10 | 97.26 | 104.03 | 107.80 | a | 108.39 | 104.27 | 92.10 | a | 70.40 | 58.06 | 86.61 | |||||||||||
1993 | 58.94 | 65.46 | ----- | z | 89.84 | e | 98.10 | 104.23 | 108.71 | 108.13 | 103.28 | a | 90.77 | a | 70.87 | 65.06 | 87.58 | a | ||||||||
1994 | 69.13 | 67.41 | a | 82.32 | 89.07 | 96.74 | 112.17 | 113.07 | a | 113.23 | 104.50 | 88.65 | 69.31 | a | 64.21 | b | 89.15 | |||||||||
1995 | 62.29 | 75.77 | b | 75.87 | 86.11 | c | 91.17 | b | 103.48 | a | 113.13 | 114.48 | 106.27 | 90.47 | a | 80.77 | 67.45 | 88.94 | ||||||||
1996 | 68.00 | b | 73.25 | a | 79.40 | a | 90.63 | 99.19 | 108.00 | 113.00 | 110.39 | 98.50 | 87.23 | 74.70 | c | 64.33 | a | 88.89 | ||||||||
1997 | 64.32 | 69.56 | c | 83.43 | a | 85.16 | e | 101.59 | d | ----- | z | 108.79 | b | 109.00 | b | 100.10 | 86.64 | f | 75.37 | 61.73 | a | 85.91 | b | |||
1998 | 65.03 | a | 63.44 | a | 74.43 | a | 79.24 | a | 89.48 | 99.52 | c | 111.04 | c | 110.07 | b | 99.27 | 86.67 | a | 72.83 | 64.71 | 84.64 | |||||
1999 | 68.48 | 71.89 | a | 79.93 | c | 78.55 | a | 93.13 | 103.20 | 106.10 | 107.29 | 100.83 | 93.06 | 78.60 | 66.52 | 87.30 | ||||||||||
2000 | 67.27 | e | 71.39 | a | 74.62 | b | 91.03 | 100.35 | 107.59 | a | 110.53 | a | 106.73 | a | 101.80 | 85.81 | 67.72 | a | 67.32 | 87.68 | ||||||
2001 | 61.61 | 65.64 | 76.20 | a | 83.03 | a | 101.20 | a | 106.86 | a | 109.06 | 109.24 | b | ----- | z | 91.16 | 74.94 | n | 61.07 | b | 86.51 | b | ||||
2002 | 63.87 | a | 69.89 | a | 75.58 | 89.20 | 94.73 | a | 107.58 | r | 110.74 | 108.75 | c | 102.67 | 84.04 | c | 74.50 | b | 63.63 | a | 85.24 | a | ||||
2003 | 71.19 | 67.14 | 76.57 | h | 82.64 | e | 96.96 | f | 105.03 | a | 111.61 | 107.50 | c | 103.96 | b | 95.58 | 68.19 | c | 62.67 | d | 87.55 | b | ||||
2004 | 63.97 | b | 64.36 | d | 85.56 | f | 85.11 | c | 97.42 | g | 105.54 | b | 109.26 | 103.17 | y | 100.77 | 85.41 | d | 67.56 | c | 63.00 | e | 82.77 | c | ||
2005 | 63.67 | a | 64.81 | b | 73.97 | 82.44 | c | 95.87 | a | 103.00 | 111.86 | b | 105.30 | d | 101.30 | c | 87.06 | 75.17 | 64.90 | a | 85.78 | |||||
2006 | 66.28 | b | 72.00 | b | 72.36 | c | 83.38 | d | 98.52 | b | 108.81 | c | 111.34 | b | 108.32 | 99.67 | 87.24 | b | 76.22 | c | 63.31 | b | 87.29 | |||
2007 | 61.24 | b | 71.46 | 81.58 | 87.37 | 98.18 | c | 107.00 | 112.15 | d | 109.70 | d | 101.97 | 88.81 | 78.74 | c | 60.29 | c | 88.21 | |||||||
2008 | 60.29 | 66.62 | 78.97 | a | 87.33 | 92.03 | 107.33 | 110.42 | 109.10 | 103.43 | 90.70 | a | 77.50 | 61.39 | 87.09 | |||||||||||
2009 | 66.74 | 67.07 | 77.65 | 85.00 | 102.39 | 100.10 | a | 112.58 | 109.39 | 104.60 | 85.40 | a | 76.53 | 61.06 | 87.38 | |||||||||||
2010 | 63.65 | 67.07 | a | 73.39 | 81.33 | 88.94 | 104.27 | 112.16 | 108.07 | a | 104.90 | 86.94 | 73.33 | 65.17 | a | 85.77 | ||||||||||
2011 | 63.13 | 65.50 | 76.87 | 85.77 | 90.42 | 103.90 | 108.29 | 111.06 | 102.00 | 88.48 | 71.50 | 61.03 | a | 85.66 | ||||||||||||
2012 | 67.61 | 70.17 | 77.10 | 86.60 | 99.32 | 106.87 | 107.03 | 107.90 | 103.13 | 89.10 | 76.77 | 63.19 | 87.90 | |||||||||||||
2013 | 59.77 | 66.68 | 81.19 | 87.97 | 96.03 | 108.77 | 108.13 | 105.61 | 97.43 | 83.83 | a | 73.34 | a | 61.87 | 85.89 | |||||||||||
2014 | 69.71 | 74.54 | 80.32 | 87.13 | 95.47 | a | 106.50 | 108.66 | b | 103.48 | 101.63 | 91.83 | b | 75.64 | b | 63.65 | 88.21 | |||||||||
2015 | 66.43 | a | 75.96 | 82.16 | 85.63 | 89.87 | 107.70 | 106.03 | 109.00 | a | 102.93 | a | 90.45 | b | 70.37 | 61.44 | d | 87.33 | ||||||||
2016 | 61.03 | 74.93 | b | 82.00 | 84.70 | 91.35 | 108.93 | 109.97 | 105.94 | 98.28 | a | 91.06 | 77.00 | 63.42 | 87.38 | |||||||||||
2017 | 60.58 | 71.21 | 82.52 | 88.75 | b | 95.35 | 109.37 | 111.52 | b | 109.03 | 98.83 | 90.83 | a | 79.20 | 68.23 | 88.79 | ||||||||||
2018 | 68.74 | 69.89 | 76.29 | 91.10 | 96.42 | 107.10 | 110.58 | 109.23 | 105.41 | c | 85.94 | 74.10 | a | 64.55 | 88.28 | |||||||||||
2019 | 62.32 | 61.71 | 76.07 | a | 87.97 | a | 89.56 | d | 103.55 | a | 110.19 | 110.52 | 101.89 | b | 86.30 | a | 75.96 | b | 59.73 | a | 85.48 | |||||
2020 | 65.22 | d | 69.26 | b | 73.07 | d | 86.20 | e | 98.82 | c | 104.78 | c | 111.87 | a | 113.29 | 106.03 | a | 95.50 | c | 75.69 | a | 65.06 | 88.73 | |||
2021 | 64.52 | 70.56 | a | 74.97 | a | 89.20 | 98.33 | a | 110.43 | 110.47 | a | 109.27 | a | 103.76 | a | 85.20 | a | 79.96 | d | 65.10 | a | 88.48 | ||||
2022 | 65.87 | a | 68.83 | d | 79.83 | a | 88.20 | 97.00 | c | 107.64 | b | 110.43 | a | 107.76 | b | 103.77 | 90.77 | 68.57 | 63.62 | b | 87.69 | |||||
2023 | 61.06 | 65.08 | b | 69.46 | c | 86.96 | b | 96.23 | 100.14 | b | 114.81 | 108.62 | b | 100.17 | 91.32 | 75.39 | b | 67.70 | a | 86.41 | ||||||
2024 | 63.61 | 68.86 | 74.77 | a | 85.52 | a | 94.33 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.19 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 64.36 | 69.36 | 77.43 | 86.54 | 95.68 | 105.87 | 110.48 | 108.63 | 102.17 | 89.36 | 74.40 | 63.63 | 87.38 | |||||||||||||
S.D. | 3.05 | 3.74 | 3.93 | 3.34 | 3.76 | 2.98 | 2.04 | 2.23 | 2.24 | 3.32 | 3.56 | 2.45 | 1.24 | |||||||||||||
SKEW | 0.34 | 0.18 | -0.22 | -0.26 | -0.27 | -0.34 | -0.34 | 0.47 | -0.21 | 0.36 | -0.38 | -0.05 | -0.34 | |||||||||||||
MAX | 71.19 | 77.32 | 83.87 | 94.41 | 102.39 | 112.17 | 114.81 | 114.48 | 106.27 | 97.19 | 80.77 | 68.23 | 89.29 | |||||||||||||
MIN | 58.94 | 61.71 | 68.97 | 78.55 | 88.94 | 99.52 | 106.03 | 103.48 | 97.43 | 83.83 | 67.56 | 58.06 | 84.64 | |||||||||||||
YRS | 36 | 37 | 34 | 37 | 34 | 34 | 36 | 35 | 35 | 35 | 35 | 36 | 29 |